I know that living organisms are made up of carbon-based molecules and other molecules, I am wondering what is meant by carbon-based molecules? Is it meant that it consists of more carbon than other elements? What other molecules are a living organism made up of?

Well, yes one could say that carbon is the main element. Carbon forms the backbone of most of the substances. Those are called organic molecules.However, there are of course also some inorganic compounds present.

Ok. Thanks, JackBean. They can contain any other element? What do you mean cells can contain any other element? Do you have any idea of, or is there any theories on why life as we know it is usually made up of these elements? Thanks